Go to card has become slow

Bob Sneidar bobsneidar at iotecdigital.com
Fri Apr 3 12:00:04 EDT 2020

Mark, you may have answered why it is my Forms Generator app is running so slow on Windows. I don’t use transactions and I make multiple queries for most transactions.

Bob S

On Apr 3, 2020, at 1:42 AM, Mark Waddingham via use-livecode <use-livecode at lists.runrev.com<mailto:use-livecode at lists.runrev.com>> wrote:

On 2020-04-03 09:25, Terence Heaford via use-livecode wrote:
Fortunately I have Time Machine running on my mac.
I have gone back to a previous copy from the 01 April 2020 and this
project is running at full speed.
I have made no modifications to the underlying functionality of this
project other than some modifications to SQLite
scripts to improve performance.
I will make those adjustments again and report on the outcome.
I do not believe it’s anything I have done.

I'd humbly  suggest that modifications to SQLite scripts constitute modifications ;)

Have you modified the SQLite database in any way?

Like most db's SQLite is heavily dependent on indices to prevent operations being slow - if some have been removed which existing queries relied upon, or one hasn't been added to support a new/modified query then that could cause a heavy performance loss.

Similarly, SQLite is transactional, so if you do lots of mutation queries outside of one each individual query will take a lot longer (as each will be under its own transaction requiring a OS disk flush/sync after each) - if you've tweaked how you are doing such queries and not taken into account transactions that could also cause a heavy performance loss.

Warmest Regards,


Mark Waddingham ~ mark at livecode.com<mailto:mark at livecode.com> ~ http://www.livecode.com/
LiveCode: Everyone can create apps

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